[roll third_party/pigweed] docs: Revised top navigation bar

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/145251

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 2a94c41c0559e46..e4754e73b724bcb
Roller-URL: https://ci.chromium.org/b/8778992821429473617
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Icb85125e3bdc23c973ccbabf5adbeeead5a18cad
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/150852
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 2a94c41..e4754e7 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2a94c41c0559e46208267bd32e626a314bbd4317
+Subproject commit e4754e73b724bcbc82336003a43bdd87f162b8b8